Padlock



K. LOCHINA.

PADLOCK'.

APPLICATION man MAYZI, 1921.

Patehted Feb. 14,1922.

INVENTOR.

m n C m 0, 0 ,LW m N 4 m a E U 6 KB KAJETA'N LOCHINA, F SGHENECTADY, NEW YORK.

PATENT OFFICE.

PADLOOK.

Specification ofLetters Patent. Patented Feb. 14, 1922.

Application filed May 21, 1921. Serial No. 471,421.

thereof, reference will be had to the fol- I lowing description and accompanying drawings, and to the appended claims in which the various'novel features of the invention are more particularly set forth.

Fig. 1 of the drawings is a face view of a padlock constructed according to theinvention.

Fig. 2 is a central transverse vertical section thereof.

Fig. 3 is a similar view to Fig. 2, but showing the key inserted in the lock.

Fig. 4; is a detail sectional view of the auxiliary bolt holder.

F 5 is a detail side view of the pad lock key.

The casing of the padlock is shown at and may be of any suitable shape. The usual shackle is shown at 11, being hinged at one end as at 12 to the casing 10 and. having a notch-13 in its opposite end adapted to be engaged by the bolt of the lock.

Hinged at one end as at 15 in the casing 10, and in a common plane with the shackle 11, is the bolt 16 having a projection 1'7 on one end adapted to engage in the notch 1 This bolt 16 is normally urged to locking position by a spring 18 coiled around a post 19 in the casing 10 and bearing against said bolt.

The lock casing 10 is provided with a key-hole 20 of ordinary shape, the key having a stem 21 of ordinary construction. and formed with a bit 22 whose wards 23 face backwardly along the stem a series of complementary ward elements in the form of arcuate fianges'2a being formed on the inner face of the casing. Fixed to the free end of the bolt 16 is a stud 25 which is adapted to be engaged by the key bit to release the bolt.

Carried by the bolt .16, in axial alinement with the key-hole, is a member which normally projects forwardly into the key-hole and is adapted to be pushed back when the key is inserted. This member comprises a sleeve 27 fixed at one end on thebolt and having a cap 28 fitting over its other end. Fixed to this cap is a plunger pin 29 which extends downwardly therethrough and through the sleeve 27, passing freely through a suitable aperture in the bolt 16 and being provided with a head 29 which acts to limit its outward movement, the cap 28 and pin 29 being pressed outwardly by a coiled expansion spring 30. Formed on the inner side of the back wall ofthe casing 10 are a pair of ribs 31 between which the head of pin 29 projects when the pinis depressed, these ribs presenting hooked elements 32 which act to prevent lateral movement of the'pin 29, andwith it the bolt 16,-except when the pin isdepressed the correct distance, at which time the head 29 registers with the T-slots' formed by said hooked members 32. The parts are so proportioned that before the cap 28 is pushed out of engaging relation with the inner flange 2st the head 29 is in engaging relation with the hooked members 32. As shown in the draw ings, the bit 22 of the key projects beyond the stem 21 thereof, the length of this projection being somewhat less than the length of movement allowed the cap 28, and such that the key head bears on the bolt 16 when the head 25) on pin 29 registers with the T- slot formed on rib 81.

lzivoted at one end on the front wall of the casing 10 is a tumbler having a notch which takes over the stud 25 on bolt 16, this tumbler being pressed against the stud by a spring The tumbler 35.11as a down wardly curved finger 85 at its free end which is adapted to be engaged by the outer one of the ward members 23 of the key to lift the tumbler from the stud 25. The parts are so proportioned that this ward member 23 will notengage the stud, the key bit having an extended element 22 which projects into the casing beyond the arcuate flanges 24 on the latter and engages the stud.

To open the lock the key is inserted in the keyhole until the bit 22 bears on the bolt 16 and is then turned, the ward member 23 of the key bit first engaging and lifting tumbler 35, and the element 22 then engaging the stud 25 and moving the bolt backward. It will be apparent thatthe pin 29 must be depressed to the exact distance in order to permit of the head 29 passing through the T-slot formed by members 32', lateral move ment of the bolt 16 being prevented unless such head and T-slot are in registry with one another.

Having thus described my invention What I claim as new and desire to protect by Letters Patent ol the United States is as follows:

1. In a padlock, a casing, hinged bolt, a. spring pressed plunger element carried thereon and movable transversely thereto, and members on said casing adapted to eugage said plunger element to prevent lateral movement thereof except when the said element is depressed to a certain selected position, said plunger element comprising a sleeve fixed to the bolt, a cap engaged over said sleeve, :1 headed pin fixed to said cap and projecting freely through said bolt, and

a coiled expansion spring surrounding said 7 pin.

2. In a padlock, a casing, a hinged bolt, a spring pressed plunger element. carried thereon and movable transversely thereto, and members on said casing adapted; to engage said plunger element to prevent lateral movement thereof except when the said element is depressed to a certain selected position, said plunger element comprising a, sleeve fixed to the bolt, a cap engaged over, said sleeve, a headed pin fixed to said cap and projecting freely through said bolt, and a coiled expansion spring surrounding said pin, said members including ward elements on one wall of the casing, and projections, presenting.,'|?'-,sl0ts on the opposite Wall of the casing. V

3;In a padlock, a casing, a hinged bolt, ward elements on said casing in the form of are-uate flanges partly surrounding the key-hole of the casing, a stud on said bolt, a tumbler engaging said stud, and a key having a ward element adapted to lift said tumbler and a projection on the key beyond said ward element adapted to engage said stud. a

4. In a padlock, a casing, a hinged bolt, Ward elements on said casing in the form of arouate flanges partly surrounding the key hole of the casing, a stud on said belt, a tumbler engaging said stud, and a key having a Ward element adapted to lift said tumbler and a projection beyond said ward element adapted to engage said stud, said key having a bit projecting longitudinally beyond the stem thereof, and a plunger member normally holding said bolt-against unlocking movement, said plunger element be ing adapted to be engaged by the end of the key stem and held in releasing, position when thebit of the key is in engagement with the face. of the bolt. l

In testimony whereof I have allixed my signature.

mark

' his KAJETAN LOGHINA.

Witness to his mark:

ANDREW SUBACH. 

